Filter-producing apparatus.



G. H. LOEW.

FILTER PRODUCING APPARATUS. APPLICATION FILED OUT. 7

Patented May 24, 1910.

fki'test: 6% L4 36 mtor:

. gag I 2e UNITED STATES PATENT OFFICE.

CHARLES H. LOEW, OF LAKEWOOD, OHIO.

FILTER-PRODUCING APPARATUS.

novelty consists in the construction andadaptation of the parts of the filter and the several successive steps of the process employed in packin using and unpacking it.

One of the di culties which has heretofore existed in using a filter of the class has been that of removing the filter mass after use. The filter, in order to be etlicient, must be tightly packed and when tightly packed it is correspondingly difiicult to unpack. If the filter elements are separately formed outside of the filter and then placed within it, they are removed more readily than when the filter mass is packed in size as a whole, but they lack uniformity ofstructure and efficiency in operation. Another point to be observed is that the filter mass should, if possible, be packed more tightly at the center, where the beer is discharged than at the outside where it en tors. I have accomplished this result for many years by increasing the quantity of wood pulp at the center, but that practice is not ,so simple as the one about to be described. I have discovered a simple and efiicient way of packing the filter so that its filter elements at the center will be packed very tightly and I have also discovered a simple way of quickly unpacking the filter. In brief, I make the inner perforated tube removable and collapsible. I make the outer drum in which the filter elements are packed practically imperforate and I remove it entirely by simple means before the filtering operation is begun and I provide a false or temporary removing drum adapted to incase the filter elements after use and by means of which they are promptly removed as a whole.

In the drawin s, Figure 1 is a central vertical section 0 a filter showing the inner tube and packing drum in place; Fig. 2 is a transverse section on the plane of the line 22 in Fig. 1; Fig. 3 is an enlarged detail of the top of the inner tube Fig. 4 is an enlarged sectional detail of the packing Specification of Letters Patent.

Application filed October 7, 1908.

Patented May 24, 1910.

Serial No. 456,608.

drum binding sleeve Fig. 5 is a miniature ierspective of the removing drum. Fig. 6 is a detail perspective view of one of the inner tube sections. 4

In the drawings, 1 is the frame of a filter provided with wheels or casters 6, having at a convenient place inwardly extending bearings 3 on which there are adapted to rest and swing the trunnions 4 of a filter casing 5 made of any suitable size and material. The frame is also provided with a press comprising a flat plate 2 adapted snugly to fit within the filter casing to press the filter mass closely together and with suitable means indicated at 7 whereby the press may bc'raised and lowered. The filter casing is provided with a bottom 11 having suitable inlet and outlet ports and it will be understood that the filter elements are arranged within the casing which is provided with a suitable air tight cover 10. All of these parts have been described in previous'patents of the United Statesissued to me and form no part of the invention.

The inner tube 13, as stated, is made of perforated material and consists of a plurality of vertical segments 15 provided with a lower base or support 16 into which they fit, an upper clamping ring 17 which engages their upper edges and a wing nut 18, or a similar device, by which they may be secured firmly together through a central clamping rod 19. The packing drum 12 is also made of a plurality of vertical segments 20 which rest upon the bottom 11. Each segment has a reverted vertical flange 21 and the adjacent flanges of neighborin segments are secured together by vertica metal sleeves 22 having inturned flanges 23 adapted to slide between the segments 20 and their flanges 21 forming a perfectly tight joint against lateral strains and yet capable of immediate and ready vertical displacement. An annular space 24 is left between the packing drum and the casing.

A removing drum 25 is adapted to fit between the casm and the packed filter mass. In use the fi ter is packed in the usual manner, a woven wire or similar plate 30 centrally apertured to pass over the inner tube and constituting the lowermost inlet conduit is put at the bottom of the space between the inner tube 13 and drum 12. The filter mass'31 is then put in position, then an outlet conductor 32, then more filter mass, then an inlet conductor, then more filter mass and so on until the filter is full. As every second or third layer is inserted the press is lowered and operated to compress-the mass tightly.

I have discovered What heretofore has remained unsuspected, that if the inner tube is perforated and the outer drum is substantially not perforated, the filter mass will be packed more tightly against and around the perforated surfaces than the imperferate or less highly perforated surfaces. I say less highly perforated because I find that any substantial difference in the fol'aminous character of the Walls will produce the relative more tightly packed filter mass near the more highly perforated surface and some few perforations are desirable in the outer drum for initial or surface drain- As the press descends against the mass of i wood pulp which is mixed with water the latter is 'expelled and seeking the easiest exit passes through that one of the retaining surfaces more highly perforated. The continued pressure of the press naturally therefore packs the filter mass tighter around and adjacent to such surface. If the outer drum was highly perforated and the inner drum was less highly perforated the filter mass would be more tightly packed against the drum. After the filter mass is tightly packed, the sleeves 22 are pulled out and the drum segments 20 removed. Tl-

beer is then turned on first entering the an nular space Q-l between the casing and the packed filter mass then passing through the filter mass and into the inner tube. After the filtering operation is concluded'a-nd it is desired to remove the filtering elements, the cover is removed. The removing drum 25 is inserted in the annular space 2% surrounding the filter mass and inside of the casing. The wing nuts and clamping ring of the inner tube are then removed. A hook is then attached to one of the segments 20 and to the filter press and whenthe latter is moved upward the segment C()!ll0S\Willl it. The remainder of the inner tube is then removed. The filter is then tilted so that its former vertical axis becomes horizontal and rcmoviugdhe drum the entire lilter mass within it is pulled out.

What I elaim new is 1. The combination with perforated spaced outcrl and inner filter forming walls,

one being more highly perforated than the other, of means for pressing filtering materialbetween the walls.

2. A. device of the character set forth pro-.

pressed the pulp is packed more tightly near the inner wall than near the outer wall, the

outer wall of the receptacle being removable, and its inner wall being collapsible.

4. A device of the character set forth provided with an annular receptacle'adapted to receive pulp mixed with Water in which it is compressed to form a' filtering medium, one wall of the receptacle being highly perforated and the other wall being= less highly perforated, whereby when compressed the.

pulp is packed moretightly against the highly perforated wall than it is against the less highly perforated wall and its inner wall being collapsible;

. 5. A. device of the character set forth provided with an inner perforated collapsible 1 tube in combination with means for pressing wood pulp mixed with wate' against the same. i

(3. A device of the character set forth provided with an inner perforated collapsible tube made of vertical segments and means for coupling the same together at bottom and top.

7. A device of the character set forth provided with an inner perforated collapsible tube made of vertical segments and means for coupling the 531110 together at bottom and top in combination with means for pressing wood pulp mixed with water against the same.

8. A device of the character set forth provided with an inner tube and an outer drum within which the filter mass is adap ed to be pressed, the outer drum being coniliosed, of vertical segments in combination with means adapted to hold the segments together while the pulp is being pressed into place.

5). A device of the character set forth provided with an inner tube and an outer drum within which the filter mass is adapted to be pressed, the utter drum being composed of vertical segments in combination with means adapted to hold the segments together while the pulp is being pressed into place, consisting of a reverted llla nge on eaclrsleeve and meansadapted to engage both llanges of adjacent segments.

10. A device of the characterlset forth prov'ided with'an inner tube and an outer drum within which the filter mass is adapted to be pressed, the outer drum being composed o'f vertical segu'ient's in combination with means adaptedto hold the segments together while the pulp is being pressed into place, consistin of an inverted flange on each sleeve an a slippable sleeve adapted to engage both flanges of adjacent segments.

11. A filter casing in combination with an inner removable drum consisting of separable segments and vertically arranged con plings adapted to hold them temporarily together.

12. A filter casing in combination with an inner removable drum consisting of separable segments and vertically arranged couplings adapted to hold them temporarily together and a smaller cylinder or drum made of collapsible segments.

13. A filter casing in combination with an inner removable drum consisting of separable segments and vertically arranged couplin s adapted to hold them temporarily toet er and a SlIltlllCl inner collapsible cyliner or drum made'of perforated segments. a

14. A filter casing in combination with an inner removable drum consisting of separablc segments and vertically arranged couplings adapted to hold them temporarily together and a smaller inner collapsible cylin der, or drum made of perforated segments and held together by rcmor'able means.

15. A filter casing in combination with an inner removable drum consisting of separable segments and vertically arranged couplings for holding the segments temporarily together, said drum and easing being spaced apart to receive a removing drum.

16. The combination with a filter casing of filter elements assembled therein whereby an annular space is left between such assembled elements and the casing, and a collapsible drum surrounded by said elements when assembled.

Witness my hand this 5th day of October, 1908, at Lakewood, Ohio.

CHARLES H. L()E\V. 

